Question:
Which of the following compound of manganese is a mixed oxide?
Which of the following compound of manganese is a mixed oxide?
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Mixed oxides:
- Contain same metal in different oxidation states
- Example: $\mathrm{Fe_3O_4}$, $\mathrm{Mn_3O_4}$
Updated On: Apr 30, 2026
- $\mathrm{MnO}$
- $\mathrm{Mn_3O_4}$
- $\mathrm{Mn_2O_3}$
- $\mathrm{MnO_2}$
- $\mathrm{Mn_2O_7}$
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The Correct Option is B
Solution and Explanation
Concept:
A mixed oxide contains the same metal in two different oxidation states.
Step 1: Analyze $\mathrm{Mn_3O_4}$.
\[ \mathrm{Mn_3O_4} = \mathrm{MnO \cdot Mn_2O_3} \]
Step 2: Identify oxidation states.
• Mn in $\mathrm{MnO}$: $+2$
• Mn in $\mathrm{Mn_2O_3}$: $+3$
Step 3: Conclusion.
Since manganese exists in two oxidation states ($+2$ and $+3$), it is a mixed oxide.
Step 1: Analyze $\mathrm{Mn_3O_4}$.
\[ \mathrm{Mn_3O_4} = \mathrm{MnO \cdot Mn_2O_3} \]
Step 2: Identify oxidation states.
• Mn in $\mathrm{MnO}$: $+2$
• Mn in $\mathrm{Mn_2O_3}$: $+3$
Step 3: Conclusion.
Since manganese exists in two oxidation states ($+2$ and $+3$), it is a mixed oxide.
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